A Lathe, Initially at Rest, Accelerates at 0

question 47

Multiple Choice

A lathe, initially at rest, accelerates at 0.60 rad/s² for 10 s, then runs at a constant angular velocity for 20 s, and finally decelerates uniformly for 10 s to come to a complete stop. What is its average angular velocity?

• A)4.5 rad/s
• B)3.5 rad/s
• C)5.0 rad/s
• D)3.0 rad/s
• E)4.0 rad/s

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